Sin título
SOUBIRAN, C.
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
< Leer menos
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Université Sciences et Technologies - Bordeaux 1 [UB]
Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
Idioma
en
Article de revue
Este ítem está publicado en
Monthly Notices of the Royal Astronomical Society. 2010, vol. 408, p. 1568–1575
Oxford University Press (OUP): Policy P - Oxford Open Option A
Resumen en inglés
Luminous FG supergiants can be used as extragalactic distance indicators. In order to fully exploit the properties of these bright stars, we must first learn how to measure their luminosities. Based primarily on classical ...Leer más >
Luminous FG supergiants can be used as extragalactic distance indicators. In order to fully exploit the properties of these bright stars, we must first learn how to measure their luminosities. Based primarily on classical Cepheids and supergiants in clusters and OB associations, we have derived 80 empirical relations connecting the line depth ratios of FeII/FeI lines with the absolute magnitudes Mv and the effective temperatures Teff. These relations have been applied to estimate the absolute magnitudes of 98 FG supergiants with an error of +/-0.26mag. The application range of our calibrations is spectral types F2-G8 and luminosity classes I and II (absolute magnitudes Mv, -0.5 to -8 mag). A comparison of our Mv determinations with values from the literature shows good agreement.< Leer menos
Palabras clave en inglés
stars: fundamental parameters
supergiants
stars: variables: Cepheids
Orígen
Importado de HalCentros de investigación